Sellermania for Amazon allows you to benchmark your prices against other competing offers on Amazon.

Define a minimum price and a wish price for every item in your inventory
Sellermania permanently monitors competition. If your price is too low, you can automatically increase it.
If the price is too high, you can automatically reduce it, as long as it remains above your minimum price.

Adjust your prices with just one click, or automatically on all your products.

Smart repricing allows you to change your prices as often as you like on Amazon.